English verb conjugation
COULD SHRUG

Regular verb: shrug - shrugged - shrugged

Affirmation

Simple form	V-ing form
I could shrug you could shrug he could shrug we could shrug you could shrug they could shrug	I could be shrugging you could be shrugging he could be shrugging we could be shrugging you could be shrugging they could be shrugging
Perfect	V-ing perfect
I could have shrugged you could have shrugged he could have shrugged we could have shrugged you could have shrugged they could have shrugged	I could have been shrugging you could have been shrugging he could have been shrugging we could have been shrugging you could have been shrugging they could have been shrugging

Negation

Simple form	V-ing form
I couldn't shrug you couldn't shrug he couldn't shrug we couldn't shrug you couldn't shrug they couldn't shrug	I couldn't be shrugging you couldn't be shrugging he couldn't be shrugging we couldn't be shrugging you couldn't be shrugging they couldn't be shrugging
Perfect	V-ing perfect
I couldn't have shrugged you couldn't have shrugged he couldn't have shrugged we couldn't have shrugged you couldn't have shrugged they couldn't have shrugged	I couldn't have been shrugging you couldn't have been shrugging he couldn't have been shrugging we couldn't have been shrugging you couldn't have been shrugging they couldn't have been shrugging

Interrogative form

Simple form	V-ing form
could I shrug? could you shrug? could he shrug? could we shrug? could you shrug? could they shrug?	could I be shrugging? could you be shrugging? could he be shrugging? could we be shrugging? could you be shrugging? could they be shrugging?
Perfect	V-ing perfect
could I have shrugged? could you have shrugged? could he have shrugged? could we have shrugged? could you have shrugged? could they have shrugged?	could I have been shrugging? could you have been shrugging? could he have been shrugging? could we have been shrugging? could you have been shrugging? could they have been shrugging?

Interro-negative form

Simple form	V-ing form
couldn't I shrug? couldn't you shrug? couldn't he shrug? couldn't we shrug? couldn't you shrug? couldn't they shrug?	couldn't I be shrugging? couldn't you be shrugging? couldn't he be shrugging? couldn't we be shrugging? couldn't you be shrugging? couldn't they be shrugging?
Perfect	V-ing perfect
couldn't I have shrugged? couldn't you have shrugged? couldn't he have shrugged? couldn't we have shrugged? couldn't you have shrugged? couldn't they have shrugged?	couldn't I have been shrugging? couldn't you have been shrugging? couldn't he have been shrugging? couldn't we have been shrugging? couldn't you have been shrugging? couldn't they have been shrugging?